Grease gun



May 21," 1929.- R, FULK 1,114,163

GREASE GUN Filed June 21', 1928` 2 sheets-511991 1 /a n /5 F0 7/ l AX v /Q NQ L4; Inventor .Attorney GREA S E GUN Filed June 21, 1928 2 Sheets-Sheet P l Inventor /O H. jf//r Patented May V2l, 1929.

` UNITED STATES v, 1,714,163 PATENT OFFICE.`

. Hann. rum;l or MULVANE, minisite.v

A 'GREASE GUN;

Application med June 21,

This invention .relates'to lnew and useful improvements in grease guns andl aims to providea device'of this character wherein oil or grease may be Ainjected 'into vvariousV parts of an, automobile under air pressure and under the action of a manually controlled pump mechanism which inthe presentV device need not be brought into'play unless fthe pressure ofthe air within the grease container is insufficient to force'the voil'or grease into the part being lubricated. p

One of vthe most important objects of this invention is to provide a grease gun of this character that 1s of 'extremely simple construction and inexpensive ofimanufacture as well as efiicient in use the sameV embodying but few parts and these so corelated as 1- to reduce the possibility of disarrangement to a minimum.

With the foregoin and other objects in view as the nature o the invention will be better understood, the same comprises the` novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying vdrawings and claimed. Y

In the drawings wherein like reference characters indicate corresponding parts throughout the several views Figure 1 is a side elevation of my improved grease gun the lower end of the grease container being illustrated in cross section. l

Figure 2 is a to plan view thereof,.and

Figure 3 is a etail longitudinal section through the hand pump mechanism of the Now having particular reference to the drawings my novel invention consists of an oil or grease container '5 of suitable capacity provided at its bottom wall with a threaded opening within which is normally arranged a plug 6 which when removed will permit the container to be filled. Within the top wall of this container isa suitable air inlet valve 7 whereby air under pressure may be Ainjected into` the container for normally tending to discharge the same through a vertical discharge pipe 8. having communication with the container adjacentv its lower end. Within the upper end of this pipe 8 is located a suitable valve 9 while communicating with this valve is an oil or grease chamber 10 having a lateral discharge port 11 with which is associated an upwardly extending discharge pipe 12 to the upper.`

`hose 13 arranged upon a grease receivingi A pressure within the container 5 falls below 192s. serial Nq; 287,131.

end of which is attached aiiiexible hose; 13` having a suitable fitting 14 upon its outer end to facilitate. the attachmentofthe hose to the various oil and grease receiving fit- ,'60

tingsj of an automobile.. Extendingl Vvertically lfrom the chamber 12 andhavingfco'mmunication therewith is a narrow-bore'and elongated cylinder 15 within'whichis rectilinearly vmovable aplunger rod 16 which 65 extends abovel the cylinder 15 asl disclosed the upper end of this cylinderbeing providedaround the rod with a suitable` ypacking 17. Vithin the lower end of-the chamyberilO-is a suit-able upwardly openingcheck valve10.

Pivotally secured at itsinner end to a suitable fitting 18k associated with theupper' end of the container 5*.is a handle lever 19 preferably composed of a single length of jmetal bent intermediate its ends to provide a pair of spaced legs as disclosed. Loosely mountedVV within a'transverse sleeve 20. at the upper end of the plunger 16 is a depending yoke 21 thelowerends'of the legs of which are 80 loosely arranged within the side legs ofk said handle lever 19, (see Figure 3). Obviously when the koil or grease within the container 5 is under pressure and the fitting 14 of the fitting of an automobile or other mechanism and the valve 9 opened the oil or grease will 1 be forced from the container into the machine fitting. However, in the levent the thefrequired degree to forcibly eject the material from the container and into the machine fitting a reciprocation ofthe handle lever 19 will cause the 'actuation of the plunger rod 16 forsucking the material from the container and thence proj ecting the same through said hose. In view of the foregoing description when .considered in conjunction with the accompanying drawings, it will beapparent that I have provided a novel, simple and highly usefulgrease gun thatis well adapted for all of the purposesfheretofore designated and even though I have herein shown and de! scribed the invention as consisting of certain detail structural elements it is nevertheless to beunderstood that some changes may be made'therein without affecting the spirit and scope of therap'pended claims. Having thus described my invention, what is claimed as new is 1. In a grease gun of the character decontainer above the level of the grease, a

discharge pipe communicating with the lower` end of the container and having a controlV valve therein, a chamber communicating with the upper end of the pipe and having a lateral nipple for' facilitating the attachment ofa discharge hose'thereto, a narrow bore cylindercommunicating with the upper end of the chamber, a plunger rod reciprocatorily mounted within said cylinder, a-yoke loosely pivoted to the upper' end ofthe plunger and depending therefrom, a handle lever pivot-ed at its inner end to the upper end of the container and loosely connected to the lower ends of the legs of said yoke all in a manner and for the purpose described.

2. In a grease gun of the class described, a grease container, means whereby air under pressure may be projected into the container above the level of the grease, a discharge pipe communicating with the lower end of the container Vand having a control valve therein, a chamber communicating with the upper end of the discharge pipe, a discharge er rod, a yoke having its crown portion journaled in said sleeve, the arms of the yoke being disposed downwardly, the free ends of the arms being directed inwardly, a pair of handle forming bars pivotally connected at their inner ends to the top of the container, said bars being disposed on opposite l sides of the upper end portion of the plunger rod, `the intermediate portions of the bars being formed with openings to accommodate the inwardly directed ends of the respective arms of the yoke to operatively connect the bars with the plunger rod, the outer' ends of Y the bars being connectedtogether to provide a handle. I

In testimony whereof I aix my signature.

HAL R. FULK. 

